// This file is triangularView of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2010 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#define TEST_CHECK_STATIC_ASSERTIONS
#include "main.h"

// This file tests the basic selfadjointView API,
// the related products and decompositions are tested in specific files.

template<typename MatrixType>
void
selfadjoint(const MatrixType& m)
{
	typedef typename MatrixType::Scalar Scalar;

	Index rows = m.rows();
	Index cols = m.cols();

	MatrixType m1 = MatrixType::Random(rows, cols), m2 = MatrixType::Random(rows, cols), m3(rows, cols), m4(rows, cols);

	m1.diagonal() = m1.diagonal().real().template cast<Scalar>();

	// check selfadjoint to dense
	m3 = m1.template selfadjointView<Upper>();
	VERIFY_IS_APPROX(MatrixType(m3.template triangularView<Upper>()), MatrixType(m1.template triangularView<Upper>()));
	VERIFY_IS_APPROX(m3, m3.adjoint());

	m3 = m1.template selfadjointView<Lower>();
	VERIFY_IS_APPROX(MatrixType(m3.template triangularView<Lower>()), MatrixType(m1.template triangularView<Lower>()));
	VERIFY_IS_APPROX(m3, m3.adjoint());

	m3 = m1.template selfadjointView<Upper>();
	m4 = m2;
	m4 += m1.template selfadjointView<Upper>();
	VERIFY_IS_APPROX(m4, m2 + m3);

	m3 = m1.template selfadjointView<Lower>();
	m4 = m2;
	m4 -= m1.template selfadjointView<Lower>();
	VERIFY_IS_APPROX(m4, m2 - m3);

	VERIFY_RAISES_STATIC_ASSERT(m2.template selfadjointView<StrictlyUpper>());
	VERIFY_RAISES_STATIC_ASSERT(m2.template selfadjointView<UnitLower>());
}

void
bug_159()
{
	Matrix3d m = Matrix3d::Random().selfadjointView<Lower>();
	EIGEN_UNUSED_VARIABLE(m)
}

EIGEN_DECLARE_TEST(selfadjoint)
{
	for (int i = 0; i < g_repeat; i++) {
		int s = internal::random<int>(1, EIGEN_TEST_MAX_SIZE);

		CALL_SUBTEST_1(selfadjoint(Matrix<float, 1, 1>()));
		CALL_SUBTEST_2(selfadjoint(Matrix<float, 2, 2>()));
		CALL_SUBTEST_3(selfadjoint(Matrix3cf()));
		CALL_SUBTEST_4(selfadjoint(MatrixXcd(s, s)));
		CALL_SUBTEST_5(selfadjoint(Matrix<float, Dynamic, Dynamic, RowMajor>(s, s)));

		TEST_SET_BUT_UNUSED_VARIABLE(s)
	}

	CALL_SUBTEST_1(bug_159());
}
